Definition of trillion
- a trillion mosquitoes out tonight
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trillion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use: 1690See Words from the same year
: the number 1,000,000,000,000 : one thousand billion
: a very large amount or number
: the number 1,000,000,000,000,000,000 : one million million million
What made you want to look up trillion? Please tell us where you read or heard it (including the quote, if possible).
Merriam-Webster's New Words Quiz—Fall 2017 Edition!
Test your knowledge - and maybe learn something along the way.TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.TAKE THE QUIZ